looking for UWA lens for both D700 and D80

[cichlid]

Sigma 12-24mm f/4.5-5.6 EX DG HSM II !

As usual, you may send the lens to Sigma Service Center for calibration to your camera body. Once calibrated, it would be sharp sharp

Oh mine, even for UWA zoom lens also have focusing problem, is that what you mean?

 

[Cowseye]

Sigma 12-24mm f/4.5-5.6 EX DG HSM II !

As usual, you may send the lens to Sigma Service Center for calibration to your camera body. Once calibrated, it would be sharp sharp

I think dun need bah, I seldom AF when shooting at UWA. Just hyper focus my way thr.

 

[rasdeep]

Some pics of Tokina 12-24/4 using d700

More here
http://s616.photobucket.com/home/everysunrisesunset/tag/Tokina+12-24mm

 

[nikonriana]

Mind if i ask something stupid...

When u calibrate the lens with your body...
Would anything be done to your body to cause if loses it's sharpness when you mount other lenses on?
Or does it just calibrate the lens to suits your camera body?

 

[Cowseye]

Mind if i ask something stupid...

When u calibrate the lens with your body...
Would anything be done to your body to cause if loses it's sharpness when you mount other lenses on?
Or does it just calibrate the lens to suits your camera body?

Here's two version of stories that I was told:
1. All calibration done is on your lens. Even though manufacturer needs your camera body, the actual calibration is to calculate how far off the lens was badly calibrated during production of the lens and reverse the process. Though I'm quite skeptical to this version as they could use any camera to calibrate, why would they need you to bring your camera body?
2. Calibration is done on your lens and they are matching the lens to your body. I'm slightly more bought into this version.

There is another mean of calibration which you can do yourself if you have a camera body that has the feature. In Nikon camera body (D7000 and above less D90), there's a feature call AF Fine tune which allows you to calibrate base on a scale between -20 to +20. After each lens is calibrated, a profile will be created and saved for that lens on your camera body in which your camera will automatically load the profile (or have to manually switch) when you mount on your lens.

All this above, I'd never experience it personally. Just sharing what I know. Please feel free to correct me if there's any error.

 

[jeff7id]

Oh mine, even for UWA zoom lens also have focusing problem, is that what you mean?

I mean usually Sigma lenses have QC issues. My friends who purchase Sigma usually send it for calibration. After the calibration, some people even say it's sharpness is a par compared with original brand.